We are having the same issue here and have been banging our heads trying to fix it. PDF attachments seem to be our largest problem, but we have had a few complaints about other attachment types. We are running Exchange 2003 SP2 Enterprise on Windows 2003 Std R2 SP1. We have Symantec Mail Security 5.0.4.363. No ISA Server, No Trend Micro, No GFI Mail Essentials. Lots of corrupt PDF attachment though The second time you send the same attachment it seems to frequently go through. Not sure why it would work one time and not the other.
Our client has the same issue. Attachments sent to external domains are randomly corrupted. They are actually not corrupt but truncated. They are running Exchange 2003 Std SP2 patched fully. Running on Windows 2003 R2 Std SP2 fully patched. GFI Mail Essentials 12, latest build. Doubletake replicating to an offsite exchange server. There is no server based email antivirus. Their firewall is a Cisco PIX 501. Placed a support call to Microsoft and have been working with them for two days and still no resolution with their outsourced support. They are now escalating the call to a higher level local support team, hopefully they will be able to resolve the issue. Has anyone else in this thread gotten resolution on this issue yet? If so, please reply with details.
Thanks, Adam Murphy
EDIT I should note that this worked fine for quite some time and only recently started truncating email.
< Message edited by a_amurphy -- 3.Jul.2007 11:14:12 PM >
No resolution here yet. Still working on it with our consultants. We have since patched our servers to Windows 2003 R2 Std. SP2 and updated the hardware drivers and firmware. We are running a Cisco PIX 515e and the servers are on Dell PowerEdge 2950's. We did think about disabling the TOE and Receive-Side-Scaling from the NIC just to see if that is the issue, but we are getting pretty desperate at this point. If you find anything out...PLEASE post.
Hi, Experiencing the same problem here. PROBLEM IN DETAIL: e-mail attachments are received corrupt at destination randomly. It happens with maybe 5% of the e-mail. There is no consistence either in computer it is generated from or destination. Exactly same file and destination might work fine one day, and bad the next. CONFIGURATION DETAIL: User PCs: use MS Outlook and MS Outlook Express Server: Windows 2003 SP1 mail software: mailgate, that resends the e-mail to an external mail provider e-mail appears ok in the sent box, no corruption here. This program includes a mail virus scanner extension, installed anti-virus software in server: symante corporate 9.0 We have no firewall TESTS MADE: tests have been made with e-mails in plain text, html format, and html with company logo. It appears to have no effect, since all forms present occasionally the same problem.
Any help will be greatly appreciated! Thanks in advance. Diego
Third rep up the chain from Microsoft and it looks like we may have a winner. The current rep found a KB article/ Hotfix that may fix the issue. I applied it and will test tomorrow. If this does not fix the issue, he says there is another ongoing attempt to fix another issue that does not yet have a hotfix available which might be the fix for this. I will post an update tomorrow when I find out. The KB article is here. [link=default.aspx?scid=kb;EN-US;937625]http://support.microsoft.com/default.aspx?scid=kb;EN-US;937625[/link] You have to open an incident with MS to actually get the hotfix. I am assuming this is because you can mess up your environment if the hotfix is not for your issue. Since the issue is MS's fault they will not charge for the incident.
I checked with my client, after a week they have not had any complaints about the outbound attachments being corrupted/truncated. It looks like that patch did the trick.
Adam Murphy
Update: I double checked with the client, the problem is still occurring. We still have no resolution from Microsoft.
< Message edited by a_amurphy -- 1.Oct.2007 10:50:52 AM >
Has anyone had any luck on this? I have yet to figure out a solution. I uninstalled GFI, disabled symantec antivirus, yet, the attachments are still being stripped a few bytes causing it to be corrupt...
Ok, it looks like we finally got it working. It was IP Chimneys. Microsoft's implementation of TCP/IP Offloading, which which puts all of the computational work for TCP/IP off of the CPU and onto the processor in the NIC. It is installed and enabled by default when you install SP2 for Windows Server 2003. TCP/IP offloading can cause network problems and data loss if the server is communicating with older equipment, and I have seen this happen before in different situations. MS had me disable IP Chimneys and, as far as the client has told me, so far the problem has not recurred.
Here is what the MS rep sent me, procedure wise.
To work around this problem, disable the TCP Chimney Offload feature. To do this, follow these steps:
1. Click Start, click Run, type cmd , and then press ENTER. 2. At the command prompt, type the following command, and then press ENTER: Netsh int ip set chimney DISABLED
Note You do not have to restart the server after you run this command.
If the performance of Windows Server 2003 decreases after you disable the TCP Chimney Offload feature, follow these additional steps:
1. Click Start, click Run, type Regedit , and then click OK. 2. Locate the following registry subkey: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters 3. Double-click the EnableTCPChimney registry entry. 4. In the Edit DWORD Value dialog box, type 0 in the Value data box, and then click OK. 5. Double-click the ParametersEnableRSS registry entry. 6. In the Edit DWORD Value dialog box, type 0 in the Value data box, and then click OK. 7. Double-click the EnableTCPA registry entry. 8. In the Edit DWORD Value dialog box, type 0 in the Value data box, and then click OK. 9. Restart the server.
I put it into practice the 2 posts over this and its working all OK, if some error ocurr i will post it, but for now its all working perfect. Thank you!
I seem to be running into a similar issue. I have a few users that send out mass emails every week and not until just about 2 or 3 weeks ago this started happening. I sent out a test email after running the ip chimney disable command on our exchange server to 848 people. About 99.5% of these email address are external email addresses. 60 recipients have replied so far that they could not open the attached file. I'm not sure what else I can do... anyone have an idea?
I have an Exchange Server 2003 SP2 on Windows Server 2003 SP2 and GFI Mail Essentials 14 x86 as well as McAfee Group Shield 6.02. We send out dozens of emails a day with attachments, and (1) reciepient yesterday called and said that he wasn't able to open an attachment from us.
He also pointed out that he has several other senders emails that he's not able to open, but it's not consistent. I sent him two emails with identical attachments 1MB in size, the first he was able to open, and the second he was not. When he sent me back the corrupted attachment, instead of being 1MB in size, it was 98kb.
The "IP Chimney" solution mentioned a few posts back would that be something that he should apply to his server, or something to apply to our server, or both?
Other common attributes are that we're on the same ISP, both using Exchange.
|
My Subscription |
My Forums |
Address Book |
Member List |
Search |
FAQ |
Ticket List |
Log Out
Printable Version
All Forums >> [Microsoft Exchange 2003] >> General >> RE: Corrupt email attachments 
RE: Corrupt email attachments - 
New Messages
No New Messages
Hot Topic w/ New Messages
Hot Topic w/o New Messages
Locked w/ New Messages
Locked w/o New Messages
Post New Thread
